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Finding the Third Proportional to 13,140 and 15,316

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Solution

The third proportional to 13,140 and 15,316 is: 17,852.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140 : 15,316 = 15,316 : x
  2. Step 2: Convert to fraction form
    13,140/15,316 = 15,316/x
  3. Step 3: Cross multiply
    13,140x = 15,316 × 15,316
  4. Step 4: Simplify right side
    13,140x = 234,579,856
  5. Step 5: Solve for x
    x = 234,579,856/13,140
  6. Step 6: Final answer
    x = 17,852.35

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.